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Showing 1 to 10 of 10 for “"Double base"”.
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DEVELOPMENT OF INNOVATIVE BURN RATE ADDITIVES FOR DOUBLE BASE PROPELLANT
… in the 1940s that the addition of lead to double-base propellants, resulted in beneficial burn rate phenomena. However, due to its toxicity the Department of Defense has been trying to find a replacement for lead over the last decade. Research efforts with this goal in mind have generally …
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Investigation of the Manufacturing Variables of Cast Double-base Propellant
The casting of double-base propellant involves the filling with liquid of a mould packed with solid particles. Simultaneous mass transfer between the phases, known as gelation, retards the flow, hindering the prediction of casting time. A mathematical model to predict casting times is developed via …
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Nitrosation reactions of sym-diethyldiphenylurea and stabilizer degradation in double-base propellants
… the nitrocellulose residues (obtained from aged double-base propellants), by means of thin-layer chromatographic and spectrophotometry methods. Another aim was to devise a convenient method for indicating the age of these propellants."
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Examination of the small scale slow cookoff behavior of a cast modified double base propellant
… cookoff behavior of a proprietary cast modified double base (CMDB) propellant was examined using a variety of diagnostic techniques with the ultimate goal of capturing aspects of the chemical, physical, and morphological behavior of the propellant during gradual heating and ignition. Experimental …
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Chemical Analysis, Databasing, and Statistical Analysis of Smokeless Powders for Forensic Application
… their primary energetic materials; where single base powders contain nitrocellulose as their primary energetic material, double and triple base powders contain nitroglycerin in addition to nitrocellulose, and triple base powders also contain nitroguanidine. Additional organic compounds, while not …
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Supercritical fluid chromatography of nitrogen-containing compounds on packed columns
… for separation of non-polymeric components in double-base rocket propellants. Both supercritical CO₂ and CH₂Cl₂ were compared as a solvent for extraction of nonpolymeric components in "good" and "bad" double-base propellant. Finally, twenty-four phenylthiohydantion amino acids (PTH-AA) have …
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Phytoremediation of nitroglycerin in smokeless powders
… in commercial smokeless powder from soil. Double base smokeless powder was applied to soil mesocosms at rates of 0, 1.0, 5.0 and 10% (w/w). Nitroglycerin-contaminated mesocosms were seeded with oats (Avena sativa) or planted with live sedge plants (Carex vulpinoidea). In addition, composted …
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Improved Arithmetic in the Ideal Class Group of Imaginary Quadratic Number Fields with an Application to Integer Factoring
… steps search, as well as by using optimized double-based representations of exponents, and general improvements to arithmetic in the ideal class group. Since the target architecture has 64 bit machine words, we specialize two implementations of ideal class arithmetic: one using 64 bit …
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The unsteady combustion of radiant heat flux-driven energetic solids
… oxidizer composite (APF series) and a catalyzed double base (N5) propellants at 1 atm are reported. Both N5 and APF data sets show significant effects of the mean flux on the measured frequency response. The frequency response of the APF propellant exhibited two frequency response peaks under the …
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Modifying burning rate and agglomeration size in aluminized composite solid propellants using mechanically activated metals
… to increase burning rates of composite modified double base (CMDB) and ammonium perchlorate (AP) composite propellants. However, the ignition temperature is larger than the comparable mechanically activated (MA) Al-Mg powder.</p> <p>Mechanical milling was performed on magnalium powders and …